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- Title
On Tailoring the Nanocrystalline Structure of ZnO to Achieve Low Friction.
- Abstract
Cross-sectional high-resolution transmission electron microscopy (HRTEM) inside worn surfaces coupled with density functional theory (DFT) calculations reveal atomistic origins of low friction and nanocrystalline plasticity when sliding on ZnO { 0002 I-textured nanocolumnar grains. The atomic layer deposited (ALD) substoichiometric ZnO film was Structurally tailored to achieve low surface energy and low growth stacking fault energy basal planes. Sliding on this defective ZnO structure resulted in an increase in both partial dislocation and basal stacking fault densities through intrafilm shear/glide of partial dislocations on the (0002} planes. This shear accommodation mode mitigated friction and brittle fracture frequently observed in microcrystalline and single crystal ZnO. These results have potentially broad implications to other defective nanocrystalline ceramics
- Subjects
ZINC oxide; NANOCRYSTALS; CRYSTAL structure; FRICTION; TRANSMISSION electron microscopy
- Publication
Tribology & Lubrication Technology, 2012, Vol 68, Issue 1, p17
- ISSN
1545-858X
- Publication type
Article